<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div> 
                </div> 
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div>
                    </div> 
                </div>
            </div>
            <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
    name: 'CityList',
    props: {
        hot: Array,
        cities: Object,
        letter: String
    },
    computed: {
        ...mapState({
            currentCity: 'city'
        })
    },
    methods: {
        handleCityClick (city) {
            // this.$store.dispatch('changeCity', city)
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    watch: {
        letter () {
            if (this.letter) {
                const element = this.$refs[this.letter][0]
                this.scroll.scrollToElement(element)
            }
        }
    },
    mounted () {
        this.scroll = new Bscroll(this.$refs.wrapper);
    },
    
}
</script>

<style lang="scss" scoped>
    .list {
        overflow: hidden;
        position: absolute;
        top: 1.58rem;
        left: 0;
        right: 0;
        bottom: 0;

        .title {
            line-height: .54rem;
            background: #eee;
            padding-left: .2rem;
            color: #666;
            font-size: .26rem;
        }
        .border-topbottom:before {
            border-color: #ccc;
        }
        .border-topbottom:after {
            border-color: #ccc;
        }
        .border-bottom:before {
            border-color: #ccc;
        }
        .border-bottom:after {
            border-color: #ccc;
        }
        .button-list {        
            padding: .1rem .6rem .1rem .1rem;
            overflow: hidden;

            .button-wrapper {
                width: 33.33%;
                float: left;
                
                .button {
                    margin: .1rem;
                    padding: .1rem 0;
                    text-align: center;
                    border: .02rem solid #ccc;
                    border-radius: .06rem;
                }
            }
        }
        .item-list {
            .item {
                line-height: .76rem;
                padding-left: .2rem;
            }
        }
    }
    
</style>

